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Vehicular Fog Computing Enabled Real-Time Collision Warning via Trajectory Calibration

Mobile Networks and Applications volume 25, pages 2482–2494 (2020)Cite this article

Abstract

Vehicular fog computing (VFC) has been envisioned as a promising paradigm for enabling a variety of emerging intelligent transportation systems (ITS). However, due to inevitable as well as non-negligible issues in wireless communication, including transmission latency and packet loss, it is still challenging in implementing safety-critical applications, such as real-time collision warning in vehicular networks. In this paper, we present a vehicular fog computing architecture, aiming at supporting effective and real-time collision warning by offloading computation and communication overheads to distributed fog nodes. With the system architecture, we further propose a trajectory calibration based collision warning (TCCW) algorithm along with tailored communication protocols. Specifically, an application-layer vehicular-to-infrastructure (V2I) communication delay is fitted by the Stable distribution with real-world field testing data. Then, a packet loss detection mechanism is designed. Finally, TCCW calibrates real-time vehicle trajectories based on received vehicle status including GPS coordinates, velocity, acceleration, heading direction, as well as the estimation of communication delay and the detection of packet loss. For performance evaluation, we build the simulation model and implement conventional solutions including cloud-based warning and fog-based warning without calibration for comparison. Real-vehicle trajectories are extracted as the input, and the simulation results demonstrate that the effectiveness of TCCW in terms of the highest precision and recall in a wide range of scenarios.

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Acknowledgments

This work was supported in part by the National Natural Science Foundation of China under Grant No.61872049, No.61876025, and No. 61803054; the Venture & Innovation Support Program for Chongqing Overseas Returnees (Project No. cx2018016), and the Fundamental Research Funds for the Central Universities (2019CDQYZDH030).

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Authors and Affiliations

  1. Key Laboratory of Dependable Service Computing in Cyber Physical Society, Ministry of Education (Chongqing University), College of Computer Science, Chongqing University, Chongqing, China

    Xincao Xu, Kai Liu, Ke Xiao, Liang Feng & Songtao Guo

  2. College of Automation, Chongqing University, Chongqing, China

    Zhou Wu

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  1. Xincao Xu
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  2. Kai Liu
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  3. Ke Xiao
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  4. Liang Feng
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  5. Zhou Wu
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  6. Songtao Guo
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Correspondence to Kai Liu.

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Xu, X., Liu, K., Xiao, K. et al. Vehicular Fog Computing Enabled Real-Time Collision Warning via Trajectory Calibration. Mobile Netw Appl 25, 2482–2494 (2020). https://doi.org/10.1007/s11036-020-01591-7

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  • DOI: https://doi.org/10.1007/s11036-020-01591-7

Keywords

  • Vehicular fog computing
  • Collision warning
  • Real-time
  • Trajectory calibration